Rolling mill



Feb. 22,1927.

G. BOSCARELLI ROLLING MILL APPLIANCE Filed May 12. 1924 3 Sheets-Sheet 1 Feb. 22 1927.

\m h mm on G BQSCARELLI ROLLING MILL APPLIANCE Filed May 12 1924 1618 954 Feb. 22,1921. G. BOSCARELU ROLLING MILL APPLIANCE- Filed May 12. 1924 3 Sheets-Sheet 5 //VVE/V TOR.

Patented Feb. 22, 1927.

PATEN T OFFICE.

GIOVANNI BOSGARELLI, OF PIACENZA, ITALY.

ROLLING-MILL APPLIANCE.

Application filed May 12',

This invention relates to improvements in rolling mill appliances and has for its object an apparatus of the kind used for lifting rolled bars and sheets from the position in which they come through the rolls to the top of the upper roll where they are taken back to the front of the rolls by the roller to be re-rolled if required, and adapted to clear on the down-stroke any sheets which may have been rolled during the up-stroke.

The apparatus is operated by compressed air or other pressure fluid and is controlled by the roller no catcher being required, and only one man is necessary to carry out the rolling process. Such operations ofthe apparatus as are essential during the cycle are performed automatically, only the rising and clearing actions being manually controlled.

Shortly described the apparatus comprises a pair of lifting bars positioned adjacent to the rear of the rolls, a pressure fluid operated the frame 6 is pivoted at 12 to the piston rod cylinder for lifting the bars throughmechanism which guides the bars so that they engage the rolled sheets however small their dimensions in the direction of rolling, clear the upper rolls but move forward so that the lifted sheets are held well over the roll in the position for delivery, and mechanism.

scend and at the bottom of the stroke auto-' 1924. Serial No. 712,887.

rious points in the operating cycle, of the mechanism for controlling the motion of the lifting bars so that they engage the rolled sheets however small their dimension in the direction of rolling, clear the upper roll and then move well over the upper roll to the position for delivery.

at suitable positions and levelsin the mill building. The whole apparatus is positioned behind the rolling mill indicated diagrammatically by the rolls 1 and 2 and the table 3 onto which the rolled sheets pass.

The lifting bars 1 are each slidably mounted on a pair of guide rods 5 secured in a frame 6. A pair of links 7 are pivoted to l the rear end of the frame 6 and to brackets 8 secured on suitable foundations. In front 9 of a pneumatic cylinder 10 by which the frame 6 and bars 1 are lifted. The cylinder 10 is pivoted at its lower end to a fixed bracket 11 on a suitable foundation. The path of the point 12 is determined by mechanism showniu detail in Figures l. 5 and 6. to which reference is directed. A long lever 13 is pivoted to a fixed bracket 14. The pivot pin 15 is secured in the bracket 14: so that it cannot rotate. A short lever 16 is pivoted to the outer end of the lever 13, the pivot pin 17 being keyed to the lever 16. The lever 13 has pivoted to it a trigger 18 adapted to co-act with a slot 19 in the pin 15, and a trigger 20 adapted to co-act with a slot21 in the pin 17. The trigger 18 is provided with a tension spring 22 (Figure 1) tending to keep it in engagement With the slot 19 and the trigger 20 with a compression spring 23 tending to keep it in engagement with the slot 21. A fixed stop 24 is provided on which the lever 13 rests in the lowest position and which holds the trigger 29 out of action. In the lowest position the parts are in the positions shown in Figures 1 and 4, and the lifting bars are sufficiently close to the lower roll 1 to engage the sheets however small their dimensions in the direction of rolling. When the lift commences the long lever 13 is locked by the trigger 18 but the short lever 16 is free. This lever consequently rotates carrying its pivot 17 round and the pivot 12 moves up cylinder for lifting and lowering said lifting bars and means including a pressure fluid operated cylinder for moving said lifting bars apart and towards one another.

4. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting bars, means including a pressure fluid operated cylinder for lifting and lowering said lifting bars along a path such that they engage the rolled sheets however small their dimensions in the direction of rolling clear the upper roll but move well over the upper roll in the lifted position and means for moving said lifting bars apart and towards one another.

5. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting bars, means for lifting and lowering said lifting bars along a path such that they engage the rolled sheets however small their dimensions in the direction of rolling clear the upper roll but move well over the upper roll in the lifted position and means including a pressure fluid operated cylinder for moving said lifting bars apart and towards one another.

6. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting bars, means including a pressure fluid operated cylinder for lifting and lowering said lifting hars along a path suchthat they engage the rolled sheets however small their dimensions in the direction of rolling clear the upper roll but move well over the upper roll in the lifted position and means includ- 1ng a pressure fluid operated cylinder for moving said lifting bars apart and towards one another.

7. Apparatus for use 111 rollmg mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprismg a pair of lifting bars,

manually controlled means for lifting said bars, independently manually controlled means for moving said lifting bars apart and automatic means for lowering said lifting hars when they have moved apart and for moving them towards one another when they have reached the lowest position.

i 8. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting bars,

manually controlled means for lifting said bars along a path such that they engage the rolled sheets however small their di mensions in the direction of rolling clear the upper roll but move well over the upper roll in the lifted position, independently manually controlled means for moving. said lifting bars apart and automatic means for lowering said lifting bars when they have moved apart and for moving them towards one another when they have reached the lowest position.

9. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting bars,

means including a pressure fluid operated cylinder for lifting and lcwering said bars along a path such that they engage the rolled sheets however small their dimensions in the direction of rolling clear the upper roll but move well over the upper roll in the lifted position, manually operated means for controlling the lifting action of said cylinder, manually controlled means for moving said lifting bars apart and automatic means controlling the lowering action of said cylinder when said lifting bars have moved apart and for moving them towards one another when they have reached the lowest position.

10. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting hats, manually controlled means for lifting said bars along a path such that they engage the rolled sheets however small their dimensions in the direction of rolling clear the upper roll but move well over the upper roll in the lifted position, means including a pressure fluid operated cylinder for moving said lifting bars apart and towards one another, manually operated means for con? trolling said cylinder to move said lifting lea-rs apart and automatic means for lowering said lifting bars when they have moved apart and for controlling said cylinder to move them towards one another when they have reached the lowest position.

11. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a pair of lifting bars,

- means for controlling the lifting action of said cylinder, means including a second pressure fluid operated cylinder for moving said lifting bars apart and towards one another, manually operated means for controlling said second cylinder to move said lifting bars apart, automatic means for effecting the lowering action of said cylinder when said lifting bars have been moved apart and for controlling said second cylinder to move said lifting-bars towards one another when they have reached the lowest position.

12. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the downstroke sheets rolled during the lip-stroke comprising a frame, apair of lifting bars slidably carriedon said frame, a pneumatic cylinder pivotally supported on a fixed bracket below said frame, a long lever pivoted to a fixed b ticket in front of said cylinder, a short lever pivoted to said long lever behind said cylinder, a pivot connection between the piston rod of said cylin der, said frame and the free end of said short lever, a spring loaded trigger pivoted on said long lever for locking it when in the lowest position, an arm on said trigger adapted to be engaged by said short lever at the end of its movement to release said trigger, a second spring loaded trigger pivoted on said long lever for locking said short lever, a stop for supporting said long lever in the lowest position and for withdrawing said second trigger in this position, links pivoted to fixed brackets and to the rear of said frame, valves for operating said. cylinder, and neans for moving said lifting bars apart and towardsone another.

13. Apparatus for use in rolling mills for lifting rolled bars and adapted to clearon the down-stroke sheets rolled during the up stroke comprising a frame, a pair of lifting bars slidably carried on said frame, means for lifting and lowering said frame, a pneumatic cylinder carried in said frame, a pair of three-armed levers'pivotally carried in said frame, a cross-head on the piston rod or said cylinder in operative connection with said levers, links on eachofsaid levers connected to each of sa1d lifting bars and valves for controlling said cylinder.

14', Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke com" risin: a frame a )air of liftin Q 7 b bars slidab'ly carried on said frame, a pneumatic cylinder pivotally supported on a fixed bracket below said frame, a long lever pivoted to a fixed bracket in front of said cylin der, a short lever pivoted to said long lever behind said cylinder, a pivot connection between the piston rod of said cylinder, said frame and the free end of said short lever, a spring loaded trigger pivoted, on said long lever for looking it when in the lowest po siti'on, an arm on said trigger adapted to be engaged by said short lever at the end of its movementto release said trigger, a second spring loaded trigger pivoted on said long lever for locking said short lever, a stop for supporting said long lever in the lowest position and for' withdr wing said second trigger in" this position, links pivoted to fixed brackets and to the rear of said frame, valves for operating said cylinder, a second pneumatic cylinder carriedin said frame, a pair of three-armed levers pivot lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke compris ng a frame, a: pair of lift ng bars slidably carried on said frame, means including apneumatic cylinder for lifting and lowering said frame, means mcluding a second pneumatic cylinder carried insaid frame for moving'said lifting bars apart and towards one another, afoot valve for controlling the lifting action of said cylinder, a foot valve for controlling said second cylinder to effect the movement of said bars apart, a valve adjacent to one of said lifting bars for controlling the lowering action of said cylinder, a plate on said lifting bar shaped to engage said valve when said liftingvbars have been moved apart and remain in contactwith said valve during the automatic lowering caused thereby and release said valve at the end of said lowering action, a projection on said plate, a valve for controlling said second cylinder to move said bars towards one another positioned so as to be operated by said projection in the lowered position of said lifting bars while they are in the apart position and to be released when said bars have moved the full distance towards one another. 7 v

.16. Apparatus for use in rolling mills for lifting rolled bars and adapted to clear on the down-stroke sheets rolled during the upstroke comprising a frame, a pair of lifting bars slidably carried on said frame, a pneumatic cylinderpivotally supported on a fixed bracketbelow said frame, a long lever pivoted to a fixed bracket in front of said cylinder, ashort lever pivoted to said long lever behind said cylinder, a pivot connection between the piston rod of said cylinder, said frame and the free end of said short lever, a spring loaded trigger pivoted on said long lever for locking itwhen in the lowest position, an arm on said trigger adapted tobe engaged by said short lever at the end of its movement to release said trigger, a second the lifting action of said cylinder, a foot valve for controlling said second cylinder to effect the movement of said bars apart, a valve adjacent to one of said lifting bars for controlling the lowering action of said cylinder, a plate on said lifting bar shaped to engage said valve when said lifting bars have been moved apart and remain in contact with said valve during the automatic lowering caused thereby and release said valve at the end of said lowering action, a

projection on said plate, a valve for controlling said second cylinder to move said bars towards one another positioned so as to be operated by said projection in the lowered position of said lifting bars while they are in the apart position. and to be released when said bars have moved the full distance towards one another.

In testimony whereof I have signed my 2 name to this specification. 

